A quirk somewhere else in Instagram revealed the app uses a web view for its entire timeline. This is something we knew, but had difficulty proving. Something that, if you knew, might have made you think that Instagram was worse application than it was.
The smart ones don’t tell you.
The designers and developers behind Instagram, Uber, and Basecamp are incredibly talented and practiced; they care about consistent interface design, enjoyable experiences, maintainability, and the reach of their apps. They have the resources to maintain a native app on each platform, but they don’t.
Your favourite app isn’t native by Kenneth Ormandy.
There is a myth in the mobile developers community that native applications are more responsive and faster than using a web view or a PhoneGap-like library.